Lock-nut device.



oommn, E. TILS'IGN & I. w. MASSON.

' LOOK HUT DEVICE.

APELIQATIOH FILED gm. 27, 1909. 1

Patentgd Sept. '7. 1909.

iiNiTE PATEN @FFEQEQ Juries SAMUEL 'oonnanr, or BELVEDERE, EDWARD 'rrLsron, or MANCHESTER, AND rn'rnn werson MASSON, ornnnvnnnnn, nnemnn.

LOCK-NUT DnvtoE.

llatented Sept. ti, i909. Serial No. 4%,566.

Q3$Al$ilh Specification of Letters Patent.

Application filed January 27, 1909.

4 in most cases to increase the depth of the nut by an amount equal to that necessary for prm-irling the transverse holes above mentioned and in order to give a ncater appearance to the nut, as well as to pcrn'iit the split pin to lie more snugly in place, we may turn .To all whom it may concern;-

Be it known that we, JULIUS SAMUEL CGNRADI', Emvnnn TILSTON, and PETER VAT- son MAssoN, all subjects of theKing of '(irreat- Britain, residing, respectively, at'Osborne House, Belvedere, in the county of Kent, England, 110 Clarence road, Rush-- down the nut from its hexagonal or polygolmc, Manchester, in the county of Lancasl onal form to a cylindrical form, c. tel, England, and Edgcworthgl Be1ved -o,'l additional length provided on the nut. for in the county of Kent, England, have inthe holes is made cylindrical. vented certain new and useful I111 )rovements l 111 Order t a 0 1 S d nventio m y be Relating to Lock-Nut Devices, whi h th I clearly,understood and readily carried into following is a specification, l efieet' We Will describe the same more fully This invention el t t lo ht, d i ,1 with reference to the accompanying drawthe object being to provide a simpler, more i g in Wh 1 .efi'ectivc and less troublesome form of loclr- Figure l is a longitudinal section ti mg arrangement than those at n-esent in use, a nut lock constructed in accordance with the The sai invention relates 111018 particuinvention. Fig. 2 is an end view of the nut. larly to that form of locking, device known 100k shown in Fig. l, and Fig 3 is a View as the Castle nut. I similar to Fig. l, but showing a modified ar- Instead. of cutting radial slots across the a gem nt 0f the parts. 7 flats or cornersof the nuts and drilling In the form or" the device shown in Fig. l, M P Ig hole for the split pin in the the bolt A is provided with a threaded porend of the bolt as is done with the Castle iOn a which extends completely to the n it has been proposed to reverse this smaller end of the bolt, at which end one or method and drill holes in the nut and cut a more opemended slots aare cut, extending slot tr nsv rs l i th d' f th b lt, A longitudinally of the bolt. In the embodiserious defect-however arises in connection ment illustrated,'ther are two slots in the with this arrangement by reasono'f the fact rough that when. the nut is tightened up on the bolt at right angles, but it is to be understood it. h th ff t. of contracting the said slot that the number and PIQCISB. arrangement of thus preventing the split pin from being in the slots do not nii'cct the gist of the 1nventrocluced. This action is chiefly dueto the angleof the V-threads in the nutand onthe bolt; the upward thrust of the nut being resolved into two other forces, one of which acts transversely to the axis of the bolt itself and so causes the contraction referred to above.

The object of our invention is to overcome this defect, for which purpose we propose ,to recess. the outer end of the nut, through which the transverse holes are formed thereby removing the threads to an extent corresponding with thedepth of the'said recess. We also propose as an alternative to remove the threads at the end of the ,bolt fora length aoproximately corresponding to the 'tion. Coaching with the the main or body portion usual polygonal shape and"is threaded interiorly to correspond with the threads on the bolt. At one end thenut is provided with an extension or turret b which is preferably of cylindrical shape and is provided with a circumferential series of transverse holes 6 through which a split in O is passed, the intermcdiate portion ot said pin being engaged with either one of the slots a in the bolt and thereby locking the nut rigidly in its adjusted position. 1

Accordin to this invention, the slot or slots in the bolt are prevented from constriction by the nut, which would make the inserbolt A is a nut- B, of which is ofthe end of the bolt and these intersect each other depth 0 the slot before-mentioned or we tion otthe locking pin in the slot diflicult'or may use both these nrrangel'nents in comimpossible, by discon-tinulng the threaded .bination. engagement of the hol and nut for a d1stanec corresponding approximately to the In order to avoid weakening the eiieeti depth of the slot or slots in the bolt. In this V strength of the threads of the mit, We prefefi wayengagement between the nut and the slotted en d of the bolt is prevented when the parts are in position to receive the transverse locking pm. In the form of the device shown in Fig. 1, this is effected by counterboring the nut at the end where the extension 1) is located, whereby a plain or unthreaded portion 1) is provided, which portion is out of engagement with the-threads of the bolt. It will be noted that the length of the counterbore or plain portion 1) COII'Q', sponds approximately to the depth of the slots a, so that the portions of metal at op-' posite sides of the slots are not forced toward each other by the nut and the muti1ation of the threads is revented.

According to the orm shown in .Fig. 3, the plain or unthreaded portion is formed on the bolt instead of on the nut. the nut B is threaded throughout its height or length, but the threads within the extension. b do not contact with the slotted endof' the bolt, as

said end is turned down to present at its extremity a smooth or unthreaded portion a that corresponds approximately in length with the depth of the slots in the bolt. The

action of a nut lock of this'kind is substantially the ,same as that of the type shown in Fig. l, as in each case the threaded engage ment between the nut and bolt is discontinued'for a distance corresponding approximately to the depth of the slots.

,It is to be understood that the counter bored nut shown in Fig. 1 may be used in connection with the rounded off bolt shown in Fig. 3, if desired. It has been found that the recessing or counterboringot' the nut.

What we claim and desire to secure by Letters Patent of the United States is 1. In a nut loch a bolt having an openended-longi'tudinal slot at its end, and a nut provided with holes to receive atransverse locking pin, the bolt and nut having threaded engagement which is discontinued for a distance corresponding approximately to the depth of the slot, to prevent engagement between the nut and the slotted end of the bolt when the parts are in position to receive the transverse locking pin.

2. In a nut lock, a threaded bolt having an open-ended longitudinal slot, and athreaded nut provided with holes to receive a transversevlocking pin, the threads on one of said threaded members being discontinued for a distance corresponding approximately to the depthof the slot in the bolt, whereby the closing of said slot is prevented, as described.

3. In a nut lock, the combination with a threaded bolt having a slot extending longitudinally thereof and open at the extremity of the bolt, of a threaded nut provided with a plain or unthreaded portion corresponding approximately in length to the depth of the slot in the bolt, and having transverse holes in the wall of said unthreaded or plain portion to receive a locking pin..

In testimony whereof we aflix our signatures in presence of two witnesses.

JULlI S SA MUEL CONRAD]. .EDWARD TILSTON.

PETER IVATSON MASSON.

f Witnesses'to the signature of Julius Samuel Conradi:

B. LAMBERTH, JosEr-H LAKE. -Witnesses to the signatures of Edward Tilston and Peter Watson Masson:

T. SELBY WARDLE, WM. NULLERSH JACKSON. 

